SOLUTION: Matrix: A= [5,2,1_7,6,3_1,0,2] B=[1,4,0_2,-1,2] Find AB if possible. If i'm on the right track AB is not possible because it is a 3x3 times a 2x3... It also asks for: 1. Fin

Algebra ->  Matrices-and-determiminant -> SOLUTION: Matrix: A= [5,2,1_7,6,3_1,0,2] B=[1,4,0_2,-1,2] Find AB if possible. If i'm on the right track AB is not possible because it is a 3x3 times a 2x3... It also asks for: 1. Fin      Log On


   

Question 620164: Matrix: A= [5,2,1_7,6,3_1,0,2] B=[1,4,0_2,-1,2]
Find AB if possible. If i'm on the right track AB is not possible because it is a 3x3 times a 2x3...
It also asks for:
1. Find BA if possible, if not explain
For this i ended up with [33,26,13_5,-2,3] but I am not confident in my answer
2. Find 3A-4B if possible

Any help would be greatly appreciated. Thanks
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

A+=+%28matrix%283%2C3%2C5%2C2%2C1%2C7%2C6%2C3%2C1%2C0%2C2%29%29B+=+%28matrix%282%2C3%2C1%2C4%2C0%2C2%2C-1%2C2%29%29  

  1. Find AB if possible, if not explain

 NOT possible: Matrices multiplication is possible only when the number of columns of first matrix

 is equal to the number of rows of second matrix

 2. Find BA if possible, if not explain

 Yes! Good Work! BA+=+%28matrix%282%2C3%2C33%2C26%2C13%2C5%2C-2%2C3%29%29 



 2. Find 3A-4B if possible:  NOT possible matrices must be the same size to add

   or subtract them